...there ought to be a better grasp of what works and what doesn't by now rather than this silly ideological war between opposing philosophies.
There just isn't, though. There are far too many constantly floating variables that make macro forecasting so difficult. It's not only our economy, it's the economy of every other nation. Currency fluctuations, global bond prices, shifting political sands, taxation, sovereign spending, holy shit, war, commodity prices, on and on.
I agree with you, it would be nice. But when a person on either end of this argument tells you they have The Answer, they're pretty much talking out of their ass.
.